Cambron etal
piston ring and groove

ABSTRACT

A PISTON RING OF HALF-KEYSTONE CONFIGURATION FITTING LOOSELY WITHIN A CONVENTIONAL RING GROOVE OF RECTANGULAR CROSS-SECTION IN WHICH THE RING IS DISHED OR TWISTED WHEN CLOSED TO CYLINDER DIAMETER TO EFFECT GOOD SEALING DURING INTAKE AND EXHAUST STROKES AND IN WHICH THE RING IS DISTORTED DURING THE POWER STROKE TO SEAL IN A DIFFERENT MANNER.

EFENSiVE PUHfi'ii UNITED STATES PATENT OFFICE Published at the request oi the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.6. 687. The obstructs 0t Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification. including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofllce makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JULY 20, 1971 1888,01 8 PISTON RING AND GROOVE Robert B. Cambron and Lemoyne E. ()tt, Peoria, 111., assignors to Caterpillar Tractor (30., Peoria, Ill. Filed Dec. 4, 1970, Ser. No. 95,080 Int. Cl. F163 9/12 US. Cl. 277-138 1 Sheet Drawing. 4 Pages Specification L mm 5% MG m A BG Mm AR w an I RP July 20, 1971 o 7 9 l A c e D d e 1 1 F 1 IILLU' INVENTORS ROBERT B. CAMBRQN LEMOYNE E. DTT 

